Bio-based UV protective films prepared with polylactic acid (PLA) and Phoebe zhennan extractives

Pan, Fangya; Chen, Lin; Yong, Jiang; Li, Xiong; Ling, Min; Xie, Jiulong; Qi, Jinqiu; Xiao, Hui; Chen, Yuzhu; Hoop, Cornelis F. De

doi:10.1016/j.ijbiomac.2018.07.189

Cited by 45 publications

(22 citation statements)

References 29 publications

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“…Therefore, the UV absorption of the extracts from Phoebe zhennan wood may be due to the aromatic rings in the compounds such as 2,3-dihydro-2,2-dimethyl-3,7-benzofurandiol; 5-allyl-6-(allyloxy)-1,3-benzodioxole and 2,3,3,4,7-pentamethyl-2,3-dihydro-benzofuran. Previous research revealed that the benzene ring structure in the diethyl ether extracts was mainly from the identified compound of 3,7-benzofurandiol,2,3-dihydro-2,2-dimethyl [33]; this result indicated that the number in compounds providing benzene ring structure in EA-EX and TR-EX was larger, which guaranteed the UV light absorption of the EA-EX and TR-EX.…”

Section: Uv-vis Spectramentioning

confidence: 86%

“…The absorption of UV-A light for UV-PF with the addition of 14% of EA-EX and TR-EX was 80% and 74%, respectively. The addition of 14% of diethyl ether extracts into a polylactic acid matrix could block 75% of UV-A, which has similar absorption ability as that of TR-EX [33]. This result revealed that EA-EX was more prefered in the preparation of UV shielding films.…”

Section: Preparation and Characterization Of The Uv-shielding Filmsmentioning

confidence: 89%

“…In our previous research, diethyl ether extracts were isolated from Phoebe zhennan, and UV protective films were successfully fabricated by adding the diethyl ether extracts into a polylactic acid matrix [33]. In later research, extracts from distilled water, methyl alcohol, ethanol, 3% HCl solution, 1% NaOH solution, acetone, diethyl ether, ethyl acetate, trichloromethane, a mixture of methylbenzene and ethanol (1:1) were also prepared, and their solution also showed UV light absorption ability.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Ethyl Acetate and Trichloromethane Extracts from Phoebe zhennan Wood Residues and Application on the Preparation of UV Shielding Films

et al. 2020

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In this work, ethyl acetate (EA) and trichloromethane (TR) extracts were extracted from Phoebe zhennan wood residues and the extracts were then applied to the preparation of UV shielding films (UV-SF). The results revealed that substances including olefins, phenols and alcohols were found in both EA and TR extracts, accounting for about 45% of all the detected substances. The two extracts had similar thermal stability and both had strong UV shielding ability. When the relative percentage of the extract is 1 wt% in solution, the extract solution almost blocked 100% of the UV-B (280–315 nm), and UV-A (315–400 nm). Two kinds of UV-SF were successfully prepared by adding the two extracts into polylactic acid (PLA) matrix. The UV-SF with the addition of 24 wt% of the extractive blocked 100% of the UV-B (280–315 nm) and more than 80% of the UV-A (315–400 nm). Moreover, the UV shielding performance of the UV-SF was still stable even after strong UV irradiation. Though the addition of extracts could somewhat decrease the thermal stability of the film, its effect on the end-use of the film was ignorable. EA extracts had less effect on the tensile properties of the films than TR extracts as the content of the extract reached 18%. The results of this study could provide fundamental information on the potential utilization of the extracts from Phoebe zhennan wood residues on the preparation of biobased UV shielding materials.

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Section: Uv-vis Spectramentioning

confidence: 86%

Section: Preparation and Characterization Of The Uv-shielding Filmsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Characterization of Ethyl Acetate and Trichloromethane Extracts from Phoebe zhennan Wood Residues and Application on the Preparation of UV Shielding Films

et al. 2020

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“…[ 137,138 ] The pre‐clinical study evaluated the adminitering of low dose of C. longa extract in rodents prevented the acute and chronic phase of arthritis and concluded the C. longa comprising an active component curcuminoid possesing an potent as antiinflammatory activity.. [ 139,140 ] Eysenhardtia polystachya – The Eysenhardtia polystachya commonly known as Palo Azul belonging to family Leguminosae comprises of chief components like (3S)‐7‐hydroxy‐2′,3′,4′,5′,8‐pentamethoxyisoflavan, (3S)3′,7‐dihydroxy‐2′,4′,5′,8‐tetramethoxyisoflavan, stigmasterol, isoduartin, cuneatin, 7‐hydroxy‐2′,4′,5′‐trimethoxyisoflavone and 3,4‐dimethoxy‐8,9‐(methylenedioxy) pterocarpan possessing anti‐inflammatory property and has been demonstrated in therapy of arthritis. [ 141–143 ] The preliminary animal data concluded that the screening the therapeutic value of ethanolic extract of E. polystachya bark against complete Freund’s adjuvant (CFA)‐induced rheumatoid arthritis model given orally significantly reduces the arthritic pain in rats. [ 144 ] The study proposed a mechanism of therapeutic value of E. polystachya by inhibiting of secondary inflammatory reactions and reducing the serum concentrations of the pro‐inflammatory cytokines like IL‐6, TNF‐α and GM‐CSF in arthritic rats.…”

Section: The Various Herbal Plants Used In the Treatment Of Rheumatoimentioning

confidence: 99%

“…Therefore, the E. polystachya bark is used for the treatment of rheumatoid arthritis and pain management. [ 143 ] Glycyrrhiza glabra – The G. glabra commonly known as liquorice belonging to family Leguminosae comprises of glycyrrhizic acid or glycyrrhizin as an active constituent and major pentacyclic triterpenoid possessing anti‐inflammatory property. [ 145 ] As the preliminary data showed the usage of G. glabra rhizome extract inhibited the leucocyte migration and auto‐antigen production in male Wistar rat possesses an anti‐arthritic activity.…”

Section: The Various Herbal Plants Used In the Treatment Of Rheumatoimentioning

confidence: 99%

Medicinal plants used against various inflammatory biomarkers for the management of rheumatoid arthritis

Singh

Mahajan

et al. 2020

Journal of Pharmacy and Pharmacology

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Objectives Rheumatoid arthritis is a chronic autoimmune disease manifested clinically by polyarthralgia associated with joint dysfunction triggering the antibodies targeting against the self‐neoepitopes determined by autoimmune responses associated with chronic arthritic attacks. The activation of macrophages and other defence cells in response to self‐epitopes as biomarkers in RA provides a better understanding of pathogenesis of disease and has led to the development of novel therapeutic approaches acting as potent inhibitors of these cells. Key findings The current review retrieved the various medicinal plants possessing an active phytoconstituents with anti‐inflammatory and antioxidant properties, which tends to be effective alternative approach over the synthetic drugs concerned with high toxic effects. The current available literature provided an evident data concluding that the active constituents like fatty acids, flavonoids, terpenes and sesquiterpene lactones attenuate the RA symptoms by targeting the inflammatory biomarkers involved in the pathogenesis of RA. Summary Despite the various synthetic treatment approaches targeting immune cells, cytokines improved the quality of life but still the drug management is challenging due to toxic and chronic teratogenic effects with anti‐arthritic drugs. The current review has elaborated the selected traditionally used herbal medicinal plants with phytoconstituents possessing anti‐inflammatory activity by suppressing the inflammatory biomarkers with lesser side effects and providing the future exploration of natural drug therapy for rheumatoid arthritis.

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Nacre‐Inspired Nanocomposite Films with Enhanced Mechanical and Barrier Properties by Self‐Assembly of Poly(Lactic Acid) Coated Mica Nanosheets

Han

Yang

et al. 2022

Adv Funct Materials

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Developing biodegradable materials such as poly(lactic acid) (PLA) is a promising strategy to reduce the reliance on non-degradable plastics and the accumulation of those wastes. However, the fabrication of high-performance biodegradable films which integrate excellent mechanical and barrier properties remains a major challenge. To address this problem, the "brick and mortar" structure, one of the most effective biomimetic models, is introduced to improve the comprehensive properties of materials. Here, a PLA-assisted exfoliation and dispersion method to prepare the PLA coated mica nanosheets (Nano-mica/PLA) from a natural mineral phlogopite is presented. By introducing the sheer force assembly, a kind of nacre-inspired nanocomposite film with the "brick and mortar" structure can be fabricated. Such a nacre-inspired nanocomposite film shows excellent mechanical properties, UV-shielding, and gas barrier properties. The overall performance of the nacre-inspired nanocomposite film is superior to commercial plastic films, which will allow it possible to break a path for practical applications of PLA in the field of packaging.

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Bio-based UV protective films prepared with polylactic acid (PLA) and Phoebe zhennan extractives

Cited by 45 publications

References 29 publications

Characterization of Ethyl Acetate and Trichloromethane Extracts from Phoebe zhennan Wood Residues and Application on the Preparation of UV Shielding Films

Characterization of Ethyl Acetate and Trichloromethane Extracts from Phoebe zhennan Wood Residues and Application on the Preparation of UV Shielding Films

Medicinal plants used against various inflammatory biomarkers for the management of rheumatoid arthritis

Nacre‐Inspired Nanocomposite Films with Enhanced Mechanical and Barrier Properties by Self‐Assembly of Poly(Lactic Acid) Coated Mica Nanosheets

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